@article{Wiik2012,
author = {Wiik, K.A. and Keizer, R. and Lappegard, T.},
title= {Relationship quality in marital and cohabiting unions across Europe},
year = {2012},
doi = {10.1111/j.1741-3737.2012.00967.x},
volume = {74},
number = {3},
pages = {389‒398},
}